Welcome to the board, thank you for joining us.
Lap banding by standard medical term is called "laparoscopic adjustable gastric banding".
The thread about basic criteria for bariatric surgery in the US is in this thread, and basically, medical criteria in foreign countries are also the same, though the definition sometimes is revised due to the differences among various ethnicities in the appearance of obesity realted issues.
Basic Criteria for Surgery.
The BMI calculator is linked into this thread.
BMI is body mass index, and is a way of measuring obesity by checking the ratio of your weight to your height.
It is the standard used in the medical definition for overweight and obesity, and when we talk about obesity and surgery, the medical society goes by this, so insurance companies follow suit.
The original information article from NIH is this.
Gastrointestinal Surgery for Severe Obesity.
A bit on the workings of how you lose weight in the following thread.
How do you lose weight through weightloss surgery.
Incidentally, banding is not the only surgery that can be reversed. Bypass can be functionally and totally revised, too, according to papers published in medical journals. The catch is, any bariatric procedure that is reversed without conversion to other methods will almost invariably result in the return to obesity.
Whatever method you choose, the surgery is a TOOL to help you revise your eating habits and improve your life style, and help you keep those newly aquired habits so you can keep your weight stable at the point that it will not endanger your health.
Good luck on your search and research,.
(((((((HUGS))))))) May your journey go well.